Key Issues:

• Validity of Patent No. 3,027,085 (085 Patent): Whether various claims within the patent are valid or invalid.

Procedural Background:

• Initial Action: The court previously ruled that the defendants did not infringe the 085 Patent, resulting in the dismissal of the initial action (Steelhead LNG (ASLNG) Ltd. v. ARC Resources Ltd., 2022 FC 998).
• Counterclaim: The defendants filed a counterclaim challenging the validity of the 085 Patent's claims.

Claims Challenged:

• The defendants challenged the validity of claims based on the Patent Act, RSC 1985, c. P-4. Issues included anticipation, obviousness, lack of utility, and overbreadth.

Court's Analysis and Decision:

• Claims Found Valid: Claims 24, 25, 27, 28, and 29 were deemed valid.
• Claims Found Partially Valid: Claims 26, 30-55 were valid to the extent they depended directly or indirectly on claims 24, 25, 27, 28, and 29, but invalid otherwise.
• Claims Found Invalid: Claims 1-23 and 56-84 were found invalid.

Key Findings:

• Anticipation and Obviousness: The court determined that some claims were anticipated or obvious based on prior art.
• Utility and Overbreadth: Specific claims were invalidated due to a lack of utility or overbreadth, particularly when the claims extended beyond what was actually disclosed.

Conclusion:

• The court declared various claims of the 085 Patent invalid while affirming the validity of others.

Costs Awarded: Although the uploaded document contains a section on costs, the precise amount awarded was not directly stated within the provided excerpts.